How do you save multiple values to a single key in a DataStore?

Lua uses tables as its data structure. They are essentially the same as any other table, with keys and values. We can assign a data store key to a table, which, in itself, contains multiple keys and values.

Tables are created with the table constructor expression, which, in it simplest form, is written as {}.

-- Declare local t and assign it to a new table.
local t = {}
-- Assign the key "foo" to value "bar".
t["foo"] = "bar"
-- Identical to t["baz"] = "qux", but syntactically sweeter.
t.baz = "qux"
-- We can use any data type as a key, except nil, and any data type as a value.
t[false] = 123
-- Get and print the value associated with certain keys.
print(t.foo) --> bar
print(t[false]) --> 123
print(t["baz"]) --> qux
-- Table fields evaluate to nil when they are not initialised.
print(t.boo) --> nil
-- We can assign nil to a table field to delete it.
t[false] = nil

In your system, each Player might have their own table of criminal records that you get and update appropriately.

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I don't really know if the script below me will work. But I have a data store that I will use in the script below. Plus I am assuming tables (Roblox tables) V.S. Strings, Ints, ETC ... Work similar in datastores.

-- Make a Table, Define the DataStore

local  Record = {"I am not a criminal yet", "The game is still loading"}
local DataStore = game:GetService("DataStoreService"):GetDataStore("Example Data Store")


-- When the player joins the game then
game.Players.PlayerAdded:Connect(function(Player) -- The player who joined the game.


    local ID = "Record".."-"..Player.UserId
    local SavedData = nil



    pcall(function() -- If there is an error don't stop running the script!!! Keep going!
    SavedData = DataStore:GetAsync(ID)
    end)

    if SavedData ~= nil then -- If we have no more data to load then ... We are done :D ah ...
        Currency.Value = SavedData
        print("Data Loaded")
    else 
        Currency.Value = 0
        print("A new player has joined the game")

    end
end)
-- When the player leaves the game then save their data
game.Players.PlayerRemoving:Connect(function(Player)  -- That defines the player
    local ID = "Record".."-"..Player.UserId
    DataStore:SetAsync(ID, Record)
end)


-- If the game gets shut down then:
game:BindToClose(function() -- Notice we don't have player in there ;).

    for i, Player in pairs(game.Players:GetPlayers()) do
        if Player then
            Player:Kick("This game is shutting down, It might be updating!")

        end
    end

    wait(3) -- The clock is ticking. Make that whatever you want.

end)

Hope that helps ;D.